I have the same problem with the library not showing thumbnails intermittently. The vertical bar that you can slide to the left to reveal the thumbnails gets pushed all the way to the right sometimes, hiding the thumbnails. Sometimes it's when the program is launched and sometimes it's when the library is revealed again.

Some clothed figures that were created in Poser Pro 2014 load with clothing items that don't show in Poser 11 Pro. I have one character whose tennis shoes don't show in preview or when rendered. The properties tab shows it as visible and the textures show up on the material room as 100% visible but you can't see the shoes. Another figure is wearing an army commando type vest with buckles and canteens and pockets, etc. Everything shows except the straps of the vest.

Where are the file counts for the folders? Was that feature removed? I really found it handy.